}

    @Override
    boolean worksWith(Jvm jvm) {
        // Milestone 4 was broken on the IBM jvm
        if (jvm.isIbmJvm() && isVersion("1.0-milestone-4")) {
            return false;
        }

        JavaVersion javaVersion = jvm.getJavaVersion();
        if (javaVersion == null) {
            throw new IllegalArgumentException();

                continue;
            }
            vars.put(entry.getKey(), entry.getValue());
        }
        return vars;
    }

    public boolean isIbmJvm() {
        for (String vendorProperty : VENDOR_PROPERTIES) {
            if (System.getProperties().containsKey(vendorProperty)

    }

    def "uses system property to determine if IBM JVM"() {
        when:
        System.properties[vendorProperty] = 'IBM Corporation'
        def jvm = Jvm.current()

        then:
        jvm.isIbmJvm()

        where:
        vendorProperty << ['java.vendor', 'java.vm.vendor']
    }

    def "finds executable for java home supplied"() {
        System.properties['java.vm.vendor'] = 'Sun'

        String httpsProtocols = System.getProperty(HTTPS_PROTOCOLS);
        if (httpsProtocols != null) {
            return httpsProtocols.split(",");
        } else if (JavaVersion.current().isJava8() && Jvm.current().isIbmJvm()) {
            return new String[]{"TLSv1.2"};
        } else if (jdkSupportsTLSProtocol("TLSv1.3")) {
            return new String[]{"TLSv1.2", "TLSv1.3"};
        } else {